Feeding device for disintegrating machines or similar working machines



L.. BARTMANN FEEDING DEVICE FOR DISINTEGRATING MACHINES OR SIMILAR WORKING MACHINES Filed April 8. 1921 Patented use 11, 1923.

Ui'iE STATES y 1,476,868 PATENT oFFlCE.

LUDWIG BARTMANN, OF BERLIN, GEB-MANY, ASSIGNOR TG N. V. MAATSCHAPPLT TOT EXPLOITATIE VAN BARTMANN PATENTEN, 0F S GRAVENHAGE, NETHERLANDS,

A DUTCH CORPORATION.

FEEDING DEVICE FOR DISINTEGRATING MACHINES OR SIMILAR WORKING MACHINES.

Application led .april 8,

To all whom t may conce/m.'

Be it known that I, LUDWIG BARTMANN, a citizen of the Republic of Germany, residing at the 48 Augsburgerstrasse, Berlin, Germany, have invented certain new and useful Improvements in a Feeding Device for Disintegrating Machines or Similar Working Machines, of which the following is a speciiication.

The invention relates to grinding mills and disintegrators or similar working machines in which. the material to be treated is fed in by means of a current of air under suction or the like; the separation of the material from the air takes place at a part where the passage for the stream of air is considerably enlarged, so that the air density is rapidly reduced and the material is dropped. In apparatus of this kind heretofore used, the nia-- terial is dropped onto the bottom of a receptacle whence it is taken through a gate or the like to the grinding or disintegrating appliance.

According to my invention the grinding or disintegrating appliance itself constitutes the bottom of the chamber into whichr the material is fed, so that the material is supplied uninterruptedly to that appliance, as it drops from the air channel.

The invention is illustrated in the annexed drawing, showing one form of construction.

Fig. 1 is a section on the line o-Z of Fig. 2, and

Fig. 2 a section on the line a-b of Fig. 1.

Fig. 3 is an illustration of a, section on the line e-f Fig. 1 seen in the direction of the arrow beneath e.

rlhe machine shown has a frame or stand 1, with a horizontal and a vertical shaft 2, 2, connected by bevel gearing. To the vertical shaft is fixed a disk 3, which constitutes the disintegrating or grinding appliance of the machine. Above the disk 3 but closely adjacent thereto, is disposed a distributing plate 4L having apertures 5, which become wider in the direction of rotation of disk 3 as they approach this disk, as shown in detail in Fig. 3. r1`hey terminate very closely above disk 3 so that the material fed into aperture 5 tends to be crowded into pocket 22 formed by the widened portion. In the underside of plate 1l, facing disk 3, are provided radial channels 23, one between each ad- 1921. serial No. 459,733.

jacent pair of apertures, which are also closed at the bottom by disk 3 to form ducts leading from the central portion of disk 3 to its periphery and beyond into receptacles 13 in the direction of arrow 2O in Fig. 1. Receptacles 13 will be referred to hereinafter in detail. rlihus,communication between apertures 5 and receptacles 13 is closed except for the material which is ground between plate 4 near pocket 22 and disk 3, which ground material passes between the teeth of disk 3 into channels 23.

Joined to the upper portion of plate 4: is an air-tight casing 11, with a feed pipe 6 connected to its upper part by a union 7 whence a plurality of pipes 8, one for each aperture 5, extend downwards, terminating some distance above the respective apertures 5. Through the pipes 6 and 8 the material is conveyed by air under suction, as indicated by the arrows 16 and 17, the air then passing upwards, as indicated by the arrow 18. The distance between the pipes 8 and plate 4: is suiiicient to allow the material to become separated from the stream of air. The separation is effected by the enlargement of the passage afforded to the air as it leaves the pipe 8, the enlargement increasing in the upward direction by providing a cone-shaped duct 9 for the air.

Means may be provided for sucking the air from the casing above the duct 9, but the construction illustrated provides for using this air for carrying the ground materialvout of the machine. For this purpose there is provided a wide central tube 10 in the casing, open at top and bottom, its lower end leading -toa central aperture in the plate 4, which extend-s to the face of disk 3. The upper end of -tube 10 has a funnel 12 fixed to it. Below the disk 3 and outside the circumference thereof there are provided receptacles 13 for the ground or disintegrated material, and these are connected to an annular pipe 14, from which a pipe 15 leads to the pump or other suction appliance. The radial duets 23 provided in plate t, and previously described, terminate at their inner ends in the periphery of the central aperture in plate l as shown in Fig. 1, so that communication is established through these ducts between central tube 10 and receptacles 13.

After the air, in passing through feed pipes 8 together with the material supplied, has become separated from the latter when dropping into apertures 5, it cannot follow the material through these apertures into ducts 23, on account of being blocked by the ground material present between apertures and ducts 23 as described before. Therevfore the only path for the air that remains open is to sweep upwards in duc-t 9 past the outer surface and iround the edge of t-he funnel 12, which retains such solid particles as mayv be carried by the stream and then the air flows down through the tube 10 and the central aperture in the plate l and through radial-ducts 23 int@ receptacles 13. In these ducts it encounters the ground material collecting there as described before and the latter is thus carried into the receptacles 13 and thence lthrough pipes 1l and 15, indicatedby thearrow 21, to a suitable separator or to a second disintegrator for finer grinding.

` Having now particularly described and ascertained the naturey of my invention and in what manner the same is to be performed, l claim:

1. ln a pneumatic feeding device for disintegrating machines or the like the combination with af disk shaped disintegra-ting too'l'and 'a plate cooperating therewith and spaced a suitable working distance apart therefrom, said plate having a. plurality of apertures bottomed vby said tool and adapted to supply the material directly to said tool, an air suction device having` a plurali-ty of Supply pipes for individually and directly 'eedingthe material to said apertures, an inverted cone shaped casing surrounding said supply pipes for leading the air einanating from said pipes in a'dir'eetion opposite to that in which the material is fed and to reduce the speed of the air current to permit. its separation from the material and means for removing the disintegrated maite rial-fromsaid tool.

Q. ln a pneumatic feeding device for dis- 'integrating machines or the like the combination with a disk shaped disintegrating tool .and a plate cooperating vtherewith and spaced a suitable working distance apart therefrom, said plate having a plurality of apertures bottomed by said tool and adapted to supply the materia-l directly to said tool, saiclapertures being widened towards their bottom ends to form pockets extending in the direction lof movement, of the tool to guide the material between said plate and said tool, an air suction device having a plurality of supply pipes for individually directly feeding the material to said apertures,` an inverted cone shaped casing' currounding said supplv pines for leading the air emanating from said pipes in a direction opposite :to that in which the ina-terial is fed and to reduce the speed of the air current to permit. its separation from the material and means Afor removing thc disintewrated material from said tool.

3. ln a pneumatic feeding device for disintegratinp' machines or the like the combination with a di shaped disintegrating tool and a. plato cooperating therewith, and spaced a suitable working distance apart therefrom, said plato having a plurality of apertures buttmned b y said too] and adapted to supply the n'uiteriul directly to said tool, said apertures heine widened towards their bottom ends .o form pockets extend ing in the direction oi" movement. o f the tool to guide the material lnwrcn the plaie and said tool, said plate also havingy a central aperture, bottomed by said tool and further having radial channels arranged in .its surface, facing the tool, and between said feeding apertures, und adapted to receive the disintegrated material, said channels commencing at said central aperture and extending beyond the periphery of said tool, an air suction device having a plurality of supply pipes for individually and directly feeding `the material to said apertures. an inverted cone shaped casing surrounding said supply pipes, for leading the air emanating from said pines in a direction opposite to thai; in 'which the material is fed and to reduce the speed of the air current to permit its separation from tlu` material and means for conductingl the separated air to said central aperture and through said channels, to remove the iisintcgratcd maferial therefrom.

Li. ln a pneumatic feeding device for disintegrating machines or the like the combi-- nation with a disk shaped disintegrating tool and a plate cooperating therewith and spaced a suitable working distance apar therefrom, said plate having a plurality of apertures bottomed by said tool and adapted to supply the material directly to said tool, said apertures being widened towards their bottom ends to form pockets extending in the direction of movement of the tool to guide the material between the plate and said Itool, said plate also having a central aperture, bottomed by said tool and further having radial channels arranged in its surface, facing the tool, and between said feeding apertures, and adapted to receive the disintegrated material, said channels commencing at said central aperture and extending beyond the periphery of said tool, an air suction device having a plurality of supply pipes for individually and directly feeding thc material to said apertures, an inverted cone shaped casing surrounding said Supply pipes. for leading the air emanating from said pipes in a direction opposite to that in which the material is fed and to reduce the spoed of the air current to permit its separation from lill' the material and means for conducting the separated air to said central aperture and through said channels, to remove the disintegrated material therefrom, and receptacles disposed in cooperative relation to the outer ends of said channels and adapted to collect the disintegrated material discharged therefrom and a suction pipe system attached to said receptacles for` causing the aforesaid movement of the air.

5. In a pneumatic device for disintegrating machines or the like the combination with a disk shaped disintegrating tool and a plate cooperatin therewith and spaced a suitable working distance apart therefrom, said plate having a plurality of apertures bottomed by said tool and adapted to supply the material directly to said tool, an air suction device having a plurality of supply pipes for individually and directly feeding the material to said apertures, an inverted cone shaped casing surrounding said supply pipes for leading the air emanating from said pipes in a direction opposite to that in which the material is fed and for reducing the speed of the air current to permit its separation from the material, said plate also having a central aperture bottomed by said tool, a tube mounted on said plate and eX- tending` upwardly from said central aperture and adapted to receive the air discharged from said casing, said plate further having radial channels arranged in its surface, facing the tool, between said feeding apertures and adapted to receive the disintegrated material, said channels commencing at said central aperture and extending beyond the periphery of said tool, to permit the air supplied from said tube to remove the disintegrated material from the channels.

6. In a pneumatic device for disintegrating machines or the like the combination with a disk shaped disintegrating tool and a plate cooperating therewith and spaced a suitable working distance apart therefrom, said plate having a plurality of apertures bottomed by said tool and adapted to supply the material directly to said tool, an air suction device having a plurality of supply pipes for individually and directly feeding the material to said apertures, an inverted cone shaped casing surrounding said supply pipes for leading the air emanating from said pipes in a direction opposite to that in Iwhich the material is fed and for reducing the speed of the air current to permit its separation from the material, said plate also having a central aperture bottomed by said tool, a tube mounted on said plate and eX- tending upwardly from said central aperture and adapted to receive the air discharged from said casing, said plate further having radial channels arranged in its surface, facing the tool, between said feeding apertures and adapted to receive the disintegrated material, said channels commencing at said central aperture and extending beyond the periphery of said tool, to permit the air supplied from said tube to remove the disintegrated material from the channels, and receptacles disposed in cooperative relation to the outer ends of said channels and adapted to collect the disintegrated material discharged through said channels and a suction pipe system attached to said receptacles for causingthe aforesaid movement of the air.

In testimony whereof, I have signed at the end of specification this 19 day of Mar.,

LUDWIG BARTMANN. Witnesses:

VoL'lHnR FITZE, WILHELM MENZEL. 

